Earthquakes

6. A vertical (or nearly vertical) fault where the blocks on either side move horizontally (slide past each other in opposite directions)
7. fractures or zone of fractures between two blocks of rock
9. A dip-slip fault in which the hanging wall (above the fault plane) moves up and over the footwall
11. An instrument used to detect and record earthquakes
13. The largest earthquake ever recorded happened in this country
15. The area of the earth's surface that is directly above the origin of an earthquake
16. waves that travel parallel to the Earth’s surface and these waves are the slowest and most damaging
18. The large, thin, plates that move relative to one another on the crust of the Earth
20. When the crust of the earth thrusts upward
21. the result of a sudden release of energy in the Earth’s crust that creates seismic waves

1. A dip-slip fault in which the hanging wall has moved downward relative to the footwall
2. Fault that makes California an area of high risk for earthquake
3. waves that travel through the interior (body) of Earth as they leave the focus
4. the scientific study of earthquakes and the propagation of elastic waves through the Earth
5. An earthquake that occurs after a "mainshock" (or larger earthquake)
7. The point within the earth where an earthquake rupture starts
8. Waves from an earthquake are known as these
10. Used to measure the strength of earthquake
12. area where earthquakes tend to focus
14. A smaller earthquake that precedes, a "mainshock"
17. The zone of earthquakes and volcanoes surrounding the Pacific Ocean
19. The process of an oceanic plate colliding with and descending underneath a continental plate